Semi-Precision Power

Wirewound Resistor

AS Series

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92

Issue D · 03.06

Welwyn Components

Power Derating

Temperature Rise @ 25°C

Selected Pulse-Handling Capability @ 125°C

Temperature Rise @ 125°C

200

175

150

125

100

75

0

Ambient Temperature (C)

AS-1/4, 1/2, 1, 1C

AS-3, 2

AS-2C

AS-5, 10

AS-2B

AS-7

25

75

125

175

225

275

275

250

200

150

100

50

25

Percent of 25C Power Rating

AS-1/4

AS-7, 10

AS-1/2

AS-2A, 2C

AS-3, AS-5

AS-2B

0

40

80

120

160

200

AS-2A, 2C

275

250

200

150

125

Percent of 125

°C Power Rating

AS-2

AS-7, 10

AS-1/2

AS-1/4

AS-2A, 2C

AS-3, AS-5

AS-2B

0

40

80

120

160

200

14

12

10

8

6

4

2

0

Resistance (ohms)

AS-2A

AS-3

AS-2B

AS-2

AS-2C

AS-1

AS-1/2

AS-1/4

0.1

0.2

0.5

1

2

5

10

Test Condition

Max

∆R

Load Life 1000 hours

1.0%

Moisture Resistance

1.0%

Temperature Cycle

0.5%

Short Time Overload

0.5%

Low Temperature Operation

0.5%

Solder Heat

0.25%

Shock

0.5%

Vibration

0.5%

Packaging

Parts are supplied taped and reeled.

Standard quantity per reel.

Environmental Testing at 25°C

Standard Quantities Per Package

2,000

AS 1, 2, 2B, 2C

1,000

AS 3

1,000

AS 5, 7, 10

500